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If we are talking about the sum of the interior angles, the sum is (11-2)x180 degrees.
This is 180x9 or 1620 degrees. The sum of the exterior angles is always 360 so that is why i assumed we were talking about the interior angles.

Given a polygon with n sides, the sum of the interior angles is (n-2)x180 degrees.

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Q: What is the sum of angles in a 11 sided polygon?
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